MCQ Question for Class 11 Biology Chapter 15 Plant Growth and Development

Students can refer to the following Plant Growth and Development MCQ Questions Class 11 Biology with Answers provided below based on the latest curriculum and examination pattern issued by CBSE and NCERT. Our teachers have provided here collection of multiple choice questions for Chapter 1 Plant Growth and Development Class 11 Biology covering all topics in your textbook so that students can assess themselves on all important topics and thoroughly prepare for their exams

Plant Growth and Development MCQ Questions Class 11 Biology with Answers

We have provided below Plant Growth and Development MCQ Questions Class 11 Biology with answers which will help the students to go through the entire syllabus and practice multiple choice questions provided here with solutions. As MCQ Questions for Class 11 Biology pdf download can be really scoring for students, you should go through all problems provided below so that you are able to get more marks in your exams.

Plant Growth and Development MCQ Questions Class 11 Biology

Question. Which of the following statements is incorrect in relation to leghaemoglobin?
(a) Leghaemoglobin function as oxygen scavenger.
(b) It is synthesized by living cell.
(c) It makes nodules pink coloured.
(d) It oxidizes enzyme nitrogenase.

Question. Which of the given statements is incorrect ?
(a) Mineral nutrients have multi-directional flow through xylem in plants.
(b) Transport in xylem is from roots to stem.
(c) Mineral nutrients are transported upwards from roots to different parts of plant.
(d) Organic Nutrients are exported from photosynthetic leaves to all parts of plant.

Question. —— is present in cysteine and methionine and is the main constituent of several coenzyme-
(a) Magnesium
(b) Sulphur
(c) Potassium
(d) Phosphorus

Question. Which of the following is not related to the non-cyclic process of light reaction?
(a) The process involves both the photosystems which are interconnected by the ETS.
(b) It results only in the synthesis of ATP, but not of NADPH + H⁺.
(c) The membranes of the grana lamellae contain both PS I and PS II.
(d) Photolysis of water is essential for it.

Question. Which of these plant hormones helps plant to tolerate extremely dry climates?
(a) ABA
(b) Auxin
(c) Cytokinin
(d) GA

Question. Select the option which is not correct with respect to enzyme action :-
(a) Substrate binds with enzyme at its active site to form enzyme substrate complex.
(b) Addition of lot of succinate does not overcome the inhibition of succinic dehydrogenase by malonate.
(c) A non-competitive inhibitor can bind with the allosteric site of the enzymes.
(d) Malonate is a competitive inhibitor of succinic dehydrogenase.

Question. According to transpiration pull theory all the given factors contributes to ascent of sap except-
(a) Cohesive and adhesive forces of water
(b) Vertical water column in xylem fibres and xylem parenchyma.
(c) Continuity of water column
(d) Transpiration pull.

Question. The microbe that produces root nodules on the roots of Alnus is :-
(a) Nitrobacter
(b) Rhizobium
(c) Nitromonas
(d) Frankia

Question. Long day plants produce flowers when they exposed to-
(a) Any random duration of light.
(b) Light period longer than a critical day length.
(c) Light period longer than 14 hrs only
(d) Light period shorter than a critical day length

Question. Photolysis of water is associated with:
(a) PS-I
(b) PS-II
(c) Stroma lamella
(d) Stroma

Question. Deficiency of which of the following elements leads to discolouration of leaves?
(a) Na
(b) Ca
(c) Cu
(d) Mg

Question. What is the quantum yield of photosynthesis ?
(a) 9%
(b) 12%
(c) 8%
(d) 38%

Question. C₂H₅OH is commercially produced through a particular species of-
(a) Saccharomyces
(b) Clostridium
(c) Trichoderma
(d) Aspergillus

Question. Which of the following steps during glycolysis is associated with utilization of ATP?
(a) Glucose – Glucose-6-phosphate
(b) Frutose-6-phosphate–Fructose-1-6- bisphosphate
(c) PEP – Pyruvic acid
(d) Both 1 and 2

Question. Refer the given reaction. What does it depict?

(a) Oxidadative amination
(b) Reductive amination
(c) Transamination
(d) Deamination

Question. Which statements are correct?
a. Cytokinins suppress the synthesis of chlorophyll.
b. Auxin causes apical dominance.
c. Gibberellin promotes stem elongation.
d. Abscisic acid enables seeds to withstand desiccation.
Options :
(a) c and b only
(b) b and c only
(c) a and c only
(d) b, c, and d only

Question. In photosynthesis light reaction included-
(a) Cyclic photophosphorylation
(b) Non cyclic photophosphorylation
(c) Both 1 and 2
(d) Reduction of PGA

Question. Which of the following is required for the chemiosmosis process?
(a) Proton pump
(b) Presence of a membrane
(c) Presence of proton gradient
(d) All of these

Question. The process of growth is maximum during   
(a) log phase
(b) lag phase
(c) senescence
(d) dormancy.

Question. Which hormone is responsible for fruit ripening?   
(a) Ethylene
(b) Auxin
(c) Ethyl chloride
(d) Cytokinin

Question. ABA is involved in 
(a) shoot elongation
(b) increased cell division
(c) dormancy of seeds
(d) root elongation.

Question. During seed germination, its stored food is mobilized by 
(a) ABA
(b) gibberellin
(c) ethylene
(d) cytokinin.

Question. Dwarfness can be controlled by treating the plant with 
(a) cytokinin 
(b) gibberellic acid
(c) auxin
(d) anti-gibberellin.

Question. Which of the following prevents the fall of fruits? 
(a) GA3
(b) NAA
(c) Ethylene
(d) Zeatin

Question. Klinostat is employed in the study of 
(a) osmosis
(b) growth movements
(c) photosynthesis
(d) respiration.

Question. Which is produced during water stress that brings stomatal closure?   
(a) Ethylene
(b) Abscisic acid
(c) Ferulic acid
(d) Coumarin

Question. The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of 
(a) NAA, 2, 4-D
(b) Phenyl acetic acid
(c) Cytokinin
(d) IAA, IBA.

Question. A plant hormone used for inducing morphogenesis in plant tissue culture is   
(a) cytokinins
(b) ethylene
(c) abscisic acid
(d) gibberellins.

Question. Which combination of gases is suitable for fruit ripening? 
(a) 80% CH₄ and 20% CO₂
(b) 80% CO₂ and 20% O₂
(c) 80% C₂H₄ and 20% CO₂
(d) 80% CO₂ and 20% CH₂

Question. Typical growth curve in plants is   
(a) stair-steps shaped
(b) parabolic
(c) sigmoid
(d) linear.

Question. Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in   
(a) annual plants
(b) floral parts
(c) vessels and tracheid differentiation
(d) leaf abscission.

Question. Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop. 
(a) Cytokinin
(b) Gibberellin
(c) Ethylene
(d) Abscisic acid

Question. Which of the following is not an inhibitory substance governing seed dormancy?   
(a) Gibberellic acid
(b) Abscisic acid
(c) Phenolic acid
(d) Para-ascorbic acid

Question. It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase  yield?   
(a) Cytokinin and Abscisic acid
(b) Auxin and Ethylene
(c) Gibberellin and Cytokinin
(d) Gibberellin and Abscisic acid

Question. Fruit and leaf drop at early stages can be prevented by the application of 
(a) ethylene  
(b) auxins
(c) gibberellic acid
(d) cytokinins.

Question. You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots? 
(a) IAA and gibberellin
(b) Auxin and cytokinin
(c) Auxin and abscisic acid
(d) Gibberellin and abscisic acid 

Question. The Avena curvature is used for bioassay of   
(a) IAA
(b) ethylene
(c) ABA
(d) GA3.

Question. Auxin can be bioassayed by   
(a) potometer
(b) lettuce hypocotyl elongation
(c) Avena coleoptile curvature
(d) hydroponics.

Question. Abscisic acid controls   
(a) cell division
(b) leaf fall and dormancy
(c) shoot elongation
(d) cell elongation and wall formation.

Question. Phototropic and geotropic movements are linked to   
(a) gibberellins
(b) enzymes
(c) auxin
(d) cytokinins.

Question. Growth is accompanied by 
(a) anabolic process and energy
(b) catabolic process which occurs at the expense of energy.
(c) metabolic processes which occur at the expense of energy
(d) energy only

Question. Germination takes place when the   
(a) previously dormant embryo is activated.
(b) cotyledons emerge above the ground.
(c) hypocotyl or epicotyl emerges above the ground.
(d) vascular tissues begin to transport fluids.

Question. The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is called 
(a) vernalization
(b) stratification
(c) denudation
(d) scarification

Question. In arithmetic growth rate, when length of the organ is plotted against time, the nature of graph curve will be —   
(a) linear
(b) sigmoidal
(c) parabolic
(d) hyperbolic

Question. The measure of the ability of the plant to produce new plant material is referred as —   
(a) efficiency index
(b) absolute growth rate
(c) arithmetic growth
(d) linear growth

Question. In which of the following process, the cell loose their protoplasm to form tracheary element? 
(a) Dedifferentiation
(b) Redifferentiation
(c) Differentiation
(d) Plasticity

Question. The hormones which was first isolated from human urine is.   
(a) indole-3-acetic acid
(b) gibberellin
(c) ethylene
(d) kinetin

Question. Which of the following is not an influence of auxins? 
(a) Apical dominance
(b) Parthenocarpy
(c) Phototropism
(d) Fruit ripening

Question. Through their effects on plant growth regulators, what do the temperature and light control in theB plants? 
(a) Apical dominance
(b) Flowering
(c) Closure of stomata
(d) Fruit elongation

Question. Which one of the following generally acts as an antagonist to gibberellins? 
(a) Zeatin
(b) Ethylene
(c) ABA
(d) IAA

Question. Which of the following movement is not related to auxin level?   
(a) Bending of shoot towards light
(b) Movement of root towards soil
(c) Nyctinastic leaf movements
(d) Movement of sunflower head tracking the sun

Question. The ability of plant to follow different pathways and produce different structures in response to environment and phases of life is termed as — 
(a) elasticity
(b) growth efficiency
(c) plasticity
(d) heterophylly

Question. Which one of the following is chemically identical to ABA? 
(a) Indole-3-acetic acid
(b) Kinetin
(c) Dormin
(d) 2, 4-D

Question. What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?   
(a) Light stimulates plant cells on the lighted side to grow faster.
(b) Auxin accumulates on the shaded side, stimulating greater cell elongation there.
(c) Green plants need light to perform photosynthesis.
(d) Green plants seek light because they are phototropic.

Question. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?   
(a) It made possible the isolation and exact identification of auxin.
(b) It is the basis for quantitative determination of small amounts of growth-promoting substances.
(c) It supports the hypothesis that IAA is auxin.
(d) It demonstrated polar movement of auxins.

Question. Which one of the following growth regulators is known as ‘stress hormone’?   
(a) Abscisic acid
(b) Ethylene
(c) GA3
(d) Indole acetic acid

Question. Phototropic curvature is the result of uneven distribution of   
(a) gibberellin
(b) phytochrome
(c) cytokinins
(d) auxin.

Question. One of the commonly used plant growth hormone in tea plantations is 
(a) ethylene
(b) abscisic acid
(c) zeatin
(d) indole-3-acetic acid.

Question. Root development is promoted by 
(a) abscisic acid
(b) auxin
(c) gibberellin
(d) ethylene.

Question. One of the synthetic auxin is 
(a) IAA
(b) GA
(c) IBA
(d) NAA.

Question. Which one of the following acids is a derivative of carotenoids? 
(a) Indole-3-acetic acid
(b) Gibberellic acid
(c) Abscisic acid
(d) Indole butyric acid

Question. Which one of the following pairs, is not correctly matched?   
(a) Gibberellic acid – Leaf fall
(b) Cytokinin – Cell division
(c) IAA – Cell wall elongation
(d) Abscissic acid – Stomatal closure

Question. Parthenocarpic tomato fruits can be produced by 
(a) treating the plants with phenylmercuric acetate
(b) removing androecium of flowers before pollen grains are released
(c) treating the plants with low concentrations of gibberellic acid and auxins
(d) raising the plants from vernalized seeds.

Question. How does pruning help in making the hedge dense? 
(a) It releases wound hormones.
(b) It induces the differentiation of new shoots from the rootstock.
(c) It frees axillary buds from apical dominance.
(d) The apical shoot grows faster after pruning.

Question. Cell elongation in internodal regions of the green plants takes place due to   
(a) indole acetic acid
(b) cytokinins
(c) gibberellins
(d) ethylene.

Question. Coconut milk factor is   
(a) an auxin
(b) a gibberellin
(c) abscisic acid
(d) cytokinin.

Question. Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone   
(a) auxin
(b) cytokinin
(c) ethylene
(d) abscisic acid.

Question. Differentiation of shoot is controlled by 
(a) high auxin : cytokinin ratio
(b) high cytokinin : auxin ratio
(c) high gibberellin : auxin ration
(d) high gibberellin : cytokinin ratio.

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